Are you looking for the best rubber O-ring factories in China? With so many options available, choosing the right one can be overwhelming. In this article, we’ll compare the top O-ring manufacturers in China, highlighting their strengths, product ranges, and what sets them apart. Let’s dive in and find the perfect fit for your needs.

Xiamen Xlong Seal Co.,Ltd 厦门旭隆密封件有限公司

China O Rings Manufacturers and Suppliers

O-Rings | China – Products | Parker NA

Product Details: Parker O-rings are circular sealing elements with circular cross-sections, mainly used in static applications. They are specified by the inside diameter and come in various materials such as Nitrile (NBR), Fluorocarbon (FKM, FPM), Ethylene Propylene (EPDM), Hydrogenated Nitrile (HNBR), Silicone (VMQ), and others. Each material has specific applications and compatibilities. For example, FKM O-rings are excellent for explosive decompression, oil & gas, and are compatible with oils, gases, hydraulic oil, and fuels. EPDM O-rings are focused on food & beverage, chemical processing, pharmaceutical, and general industrial applications. HNBR O-rings offer good mechanical robustness for automotive, heavy duty, transportation, and general

industrial applications[5].

Pros:
– Wide range of materials to suit various applications
– Excellent chemical and temperature resistance depending on the material
– Ease of service with no smearing or retightening required
– Cost-effective and require minimal space
– Gradual failure mode that is easily identifiable
– High purity and low particle generation in certain materials like Hifluor®
– Compatibility with a broad range of fluids, gases, and solids

Cons:
– Material compatibility issues with certain fluids and chemicals (e.g., NBR not c…
– Limited cold flexibility in some materials (e.g., FKM has limited cold flexibili…
– Potential for extrusion in high-pressure applications without back-up rings[1] – Some materials have poor short-term rebound or electrical properties (e.g., Buty…

Top 10 O-ring Manufacturers and Suppliers in China (2024)

China O-Ring Kits Suppliers – NNK oil seal

Product Details: The Universal Type O-Ring Kit Box 30 size is a professional-quality assortment of O-rings. It includes 382 pieces of O-rings in 30 of the most popular sizes, both in inches and millimeters. The O-rings are made from commercial-grade nitrile butadiene rubber (NBR) and fluoroelastomer (FKM) materials, offering oil, chemical, and high-pressure resistance. The kit is suitable for various applications, including machines and excavators. The O-rings have a hardness range of 60-90 Shore A and can operate in temperatures from -40°C to 260°C. The kit comes in a practical resealable plastic case and is certified with ISO9001/TS16949 standards.

Pros:
– High-quality materials (NBR and FKM) providing excellent oil and chemical resist…
– Wide range of sizes (30 sizes) to fit various applications
– Suitable for high-pressure and harsh environments
– Durable and long-lasting with UV resistance
– Practical resealable plastic case for storage
– Meets ASTM D 2000 and ISO9001/TS16949 standards

Cons:
– Limited to specific materials (NBR and FKM), which may not be suitable for all a…
– No mention of availability for custom sizes or special orders beyond the standar…
– May require additional backup rings for elevated operating pressure environments

FKM O Rings, China NBR O Ring supplier

O-Rings, Rubber Seals – Best China Manufacturer & …

Product Details: Savvy manufactures a wide range of o-rings made from various materials including rubber, metal, and other materials. The most commonly used materials are NBR, FKM (Viton), and Silicone. NBR is widely used due to its good properties and low cost. FKM/Viton offers the best comprehensive performance and is used in high-standard sealing equipment. Silicone is often used in medical and food industries due to its FDA compliance, tastelessness, non-toxicity, and resistance to high temperatures and severe cold. The temperature range for these o-rings varies, with Silicone ranging from -70°C to 220°C. The hardness of o-rings is measured in Shore A,

typically ranging from 40 to 90, with 60-70 being the most common. Savvy also produces custom o-rings, encapsulated o-rings, backup-rings, x-rings, and more.

Pros:
– High-temperature and FDA food grade compliance for certain materials
– Wide range of materials available (NBR, FKM/Viton, Silicone, etc.)
– Good wear resistance and oil resistance
– Easy to install with appropriate hardness levels
– Custom o-ring production available at low mold/tooling costs
– Fast delivery options

Cons:
– Low hardness o-rings can be prone to peeling, installation damage, extrusion, an…
– High hardness o-rings can be inconvenient to install
– Specific materials have limitations (e.g., Silicone generally uses Shore A 60, w…

Viton O Ring Suppliers, Manufacturers, Factory

O Rings Manufacturer | O Rings Supplier – Hongjie Rubber Seal

Product Details: Hongjie Sealing Technology offers a wide range of O-ring products, including custom O-rings, rubber O-rings, and silicone O-rings. They provide one-stop OEM/ODM solutions with options for custom design, color, packaging, and logo. The company adheres to various international O-Ring standards, and most sizes are already tooling, eliminating the need for additional investment. They use well-known raw material suppliers to guarantee product quality and have certified compounds to meet specific market requirements. Their laboratory is certified to develop and identify compounds per customer specifications or ASTM D200 callouts.

Pros:
– One-stop O rings OEM/ODM solution
– Custom options: design, color, packaging, logo
– Various international O-Ring standards
– Most sizes are already tooling, no additional investment needed
– Suitable and well-known raw material suppliers
– Certificated compounds to meet specific markets
– Certificated laboratory for compound development and identification

Cons:
– No specific information on pricing or cost-effectiveness provided on the page
– No details on the minimum order quantity (MOQ) or lead times

Perfluoroelastomer FFKM O ring Manufacturer

Comparison Table

Frequently Asked Questions (FAQs)

What types of materials are commonly used to make o-rings in Chinese factories?

Chinese o-ring factories typically use a variety of materials, but the most common ones are rubber compounds. NBR (Nitrile Butadiene Rubber) is the most widely used due to its good properties and low cost. Other popular materials include FKM (Viton), known for its comprehensive performance, and Silicone, which is often used in medical and food industries. Additional materials like EPDM, HNBR, and CR are also utilized depending on the specific application.

Can I customize the size, shape, and color of o-rings from Chinese manufacturers?

Yes, you can customize the size, shape, and color of o-rings from Chinese manufacturers. Many factories, such as Savvy and SWKS Seal, offer custom o-ring services where you can provide your own design drawings or specifications. They can produce o-rings in various colors by using standard RAL or Pantone color numbers, although unique colors may increase the cost and require a larger minimum order quantity.

What is the typical hardness range for o-rings, and why is it important?

The hardness of o-rings is usually measured in Shore A units and ranges from 40 to 90. However, Shore A 70 is generally considered the most suitable for most applications. The hardness is crucial because if it is too low, the o-ring may be prone to peeling and damage, while too high hardness can make installation difficult. The right hardness ensures optimal sealing performance and durability.

Do Chinese o-ring manufacturers offer certifications and quality assurance?

Yes, many Chinese o-ring manufacturers adhere to international quality standards and certifications. Companies often hold certifications such as ISO 9001, ISO 14001, IATF16949, and ISO 13485. These certifications ensure that the products meet specific quality and safety standards, providing you with reliable and high-quality o-rings.

How do Chinese o-ring factories handle delivery and logistics?

Chinese o-ring factories often have well-organized logistics systems to ensure prompt delivery. Many manufacturers, like Savvy and Xiamen Lindas Hardware Industrial Co., Ltd., use door-to-door courier services and have favorable discounts with courier companies, which helps keep the express costs low. They also offer services such as assembly, packing, and shipment, making the entire process convenient for customers.